Etherfuse x Monad: Korean Treasury Bonds Onchain

Overview

Korean Treasury Bonds (KTB) are among Asia's most liquid and stable sovereign debt instruments, rated AA by S&P as of April 2025. They trade in deep institutional markets, denominated in Korean Won, and are issued by one of the world's most creditworthy governments. Historically, accessing them has required brokerage relationships with Korean institutions, significant minimum investment thresholds, and settlement timelines operating on T+1 or T+2 cycles during fixed market hours.

Etherfuse, a regulated multichain issuer of tokenized sovereign debt, has changed that. In partnership with Shinhan Securities, one of Asia's leading securities firms and part of the Shinhan Financial Group, Etherfuse brought Korean Treasury Bonds onchain as KTB: a yield-bearing Stablebond that settles in under a second and is accessible to qualified investors around the clock. It runs on Monad.

The Challenge

Korean Treasury Bonds occupy an important position in Asian fixed income markets. They serve institutional portfolios as collateral, yield-bearing reserves, and pricing benchmarks backed by a sovereign credit that has maintained an AA rating through sustained periods of global market stress. The secondary market is deep and liquid, with active participation from both domestic and foreign institutional capital.

For investors outside Korea, however, the practical path to that exposure has always carried significant operational friction. Accessing KTB directly requires brokerage relationships with Korean institutions, familiarity with currency conversion infrastructure for the Korean Won, and acceptance of settlement timelines that run one to two business days within market hours that do not accommodate global capital flows. These constraints have nothing to do with the quality of the underlying credit. They are the accumulated legacy of market infrastructure built for a different era of finance.

A tokenized KTB Stablebond on Monad addresses each of those constraints without altering the nature of the underlying instrument. Settlement occurs in under a second. The market operates continuously. There is no minimum investment threshold, no Korean brokerage account required, and no dependence on business hours in any particular time zone. Interest is reflected directly in the token price. For institutional allocators seeking exposure to Korean sovereign credit without the operational overhead of traditional market access, the instrument presents significant benefits.

The Structure Behind the Instrument

The credibility of any tokenized real-world asset rests on what sits behind the token, and for KTB that structure is institutional.

Shinhan Securities serves as custodian for the underlying Korean Treasury Bond holdings. It is one of Korea's most established financial institutions, operating within Korean capital markets regulatory frameworks with direct access to Korean Treasury Bond markets. Every KTB token in circulation is backed by Korean government bonds held at Shinhan, providing the custodial foundation that institutional buyers require.

Etherfuse purchases and holds the underlying bonds through Shinhan, mints tokens against those holdings, and reflects accruing interest in the token price. At maturity, holders redeem for par value plus accumulated yield in the corresponding stablecoin. KYC is required for primary market participation. The entire reserve structure is subject to independent audit, conducted by BHR Mexico, a member of the SFAI international accounting network. The most recent audit, completed as of February 23, 2026, confirmed that all KTB tokens in circulation are fully backed by assets custodied at Shinhan Securities, with a verified reserve ratio of 171.14%.

Fixed income products impose settlement disciplines that most blockchain infrastructure has not been built to meet. Interest accrues continuously, token prices update in real time, and redemptions at maturity require execution that is deterministic rather than probabilistic. A network that experiences downtime, even briefly, introduces counterparty risk that is incompatible with those obligations. Monad's architecture is built around that requirement: sub-second deterministic finality, a validator network designed so that no single node failure can halt consensus, and no reported downtime since mainnet launch. For a product governed by the settlement discipline of traditional fixed income, those properties support the operation of the instrument.

KTB in Practice

The first KTB tokens were minted on Monad in January 2026, shortly after Shinhan Securities and Etherfuse announced their strategic partnership. The current issuance cycle began on March 5, 2026, with a maturity date of March 12, reflecting the short-duration structure of the underlying Korean Treasury instruments. As of March 23, 2026, the current yield is 2.25% APY, consistent with prevailing short-term Korean government bond rates.

Investors purchase KTB using USDC at a fixed conversion rate against the Korean Won. No Korean brokerage account is required. At maturity, holders redeem for par value plus accumulated interest. Prior to maturity, tokens can be traded on the secondary market at prices based on then current market conditions.

"Monad gave us the settlement infrastructure we needed to bring sovereign debt onchain without compromising on finality or cost. For a fixed income product, these were essential to operate effectively." — David Taylor, Founder and CEO, Etherfuse

The full suite on Etherfuse currently includes Mexican CETES, Brazilian Tesouro, UK Gilts, and US Treasury Notes, each independently audited and custodied by regulated institutions in the relevant jurisdictions.

"Korean Treasury Bonds are among the most stable sovereign instruments in Asia. Making them accessible to qualified investors around the clock through a regulated, audited structure is exactly the kind of financial innovation we want to be part of." — Jeseok Hong, Manager, Digital Asset Department at Shinhan Securities

Infrastructure as a Precondition

Prior attempts at tokenizing sovereign debt have encountered the same constraint: blockchain networks that cannot consistently meet the operational standards that fixed income instruments require. Fee spikes under load, probabilistic finality windows, and variable execution quality are incompatible with products where settlement precision is non-negotiable.

KTB's viability on Monad does not rest on any single performance number. It rests on the network's throughput, finality, and fee profile being stable enough that the product economics hold at any scale of participation. Continuous interest accrual works because transaction costs are negligible. Deterministic finality improves reliability of redemption at maturity. Since mainnet launch, those properties have held across more than 216 million transactions and $9.1 billion in DEX volume.

Etherfuse charges a commission ranging from 0.25% to 1.5% depending on the yield of the underlying asset.

Onchain Korean Sovereign Debt

Korean Treasury Bonds have not been inaccessible due to any deficiency in the underlying credit. The constraints have been operational: custodial friction, settlement latency, restricted market hours, and minimum investment thresholds that place the instrument out of reach for all but the largest traditional participants.

Etherfuse and Monad have removed each of those barriers without compromising the core properties of KTB. The custodian is regulated, reserves are audited and the reserve ratio is verified at 171.14%. The yield is government-backed. Settlement is deterministic and takes less than a second. It delivers exposure with easier access, better settlement, and a continuous market that does not close on weekends or Korean national holidays.

About Monad

Monad is a high-performance, EVM-compatible Layer-1 blockchain designed for high-frequency finance. It delivers up to 10,000 transactions per second, sub-second finality, and low transaction fees, operating on a decentralized network of 170+ validators across 30+ countries. Since mainnet launch in November 2025, the chain has processed over 200 million transactions and attracted 2.3 million active users across 125+ live applications.

About Shinhan Securities

Shinhan Securities is a leading securities firm in South Korea, providing a broad range of financial services across brokerage, wealth management, trading, and capital markets. The firm has been actively exploring digital asset and tokenization opportunities, including blockchain-based capital markets infrastructure and real-world asset initiatives. Through its experience in securities operations, market infrastructure, and institutional financial services, Shinhan Securities is evaluating how traditional financial systems can connect with emerging digital asset frameworks in a compliant and operationally sound manner.

About Etherfuse

Etherfuse is a regulated multichain issuer of tokenized sovereign debt. Its Stablebond products provide onchain access to government bond markets including Mexican CETES, Brazilian Tesouro, US Treasury Notes, UK Gilts, and Korean Treasury Bonds. All reserves are independently audited and held with regulated custodians in each relevant jurisdiction. Etherfuse operates under regulatory clarity established by CNBV Resolution P090/2024 in Mexico.